Operating at Best Efficiency Point

[@istihadiirawan4901]

Thanks for your great sharing sir, could you explain me what phenomenon will occur at the pump when i often operate away from BEP ? Thanks

[@amitdayal6124]

how to shift operating point to a best efficiency point?

[@abokararmh]

Thanks for your great work. Question: how do you increase and decrease the pump flow rate? Is it possible without changing the impeller size and drive speed??